CVE ID:	CVE-2007-3731
Description:	The Linux kernel 2.6.20 and 2.6.21 does not properly handle an invalid LDT segment selector in %cs (the xcs field) during ptrace single-step operations, which allows local users to cause a denial of service (NULL dereference and OOPS) via certain code that makes ptrace PTRACE_SETREGS and PTRACE_SINGLESTEP requests, related to the TRACE_IRQS_ON function, and possibly related to the arch_ptrace function.
Test IDs:	1.3.6.1.4.1.25623.1.0.58637   1.3.6.1.4.1.25623.1.0.58636
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2007-3731 20080229 rPSA-2008-0094-1 kernel http://www.securityfocus.com/archive/1/488972/100/0/threaded 25801 http://www.securityfocus.com/bid/25801 26935 http://secunia.com/advisories/26935 26955 http://secunia.com/advisories/26955 26978 http://secunia.com/advisories/26978 27322 http://secunia.com/advisories/27322 29159 http://secunia.com/advisories/29159 37286 http://osvdb.org/37286 DSA-1378 http://www.debian.org/security/2007/dsa-1378 RHSA-2007:0940 http://www.redhat.com/support/errata/RHSA-2007-0940.html USN-518-1 http://www.ubuntu.com/usn/usn-518-1 http://bugzilla.kernel.org/show_bug.cgi?id=8765 http://bugzilla.kernel.org/show_bug.cgi?id=8765 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=29eb51101c02df517ca64ec472d7501127ad1da8 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=29eb51101c02df517ca64ec472d7501127ad1da8 http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=a10d9a71bafd3a283da240d2868e71346d2aef6f http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=a10d9a71bafd3a283da240d2868e71346d2aef6f http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0094 http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0094 https://bugzilla.redhat.com/show_bug.cgi?id=248324 https://bugzilla.redhat.com/show_bug.cgi?id=248324 https://issues.rpath.com/browse/RPL-2304 https://issues.rpath.com/browse/RPL-2304 oval:org.mitre.oval:def:10394 https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10394